:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --bg-muted: #eef2f6;
  --text: #1f2328;
  --muted: #59636e;
  --border: #d0d7de;
  --accent: #0969da;
  --accent-strong: #0550ae;
  --success: #1a7f37;
  --warning: #9a6700;
  --shadow: 0 18px 48px rgba(31, 35, 40, 0.08);
  --radius: 8px;
  --content: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 20;
  padding: 8px 12px;
  border-radius: var(--radius);
  background: var(--text);
  color: #fff;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  width: min(100%, var(--content));
  min-height: 72px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 240px;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--text);
  color: #fff;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand strong {
  font-size: 14px;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-links a:hover {
  background: var(--bg-subtle);
  color: var(--text);
  text-decoration: none;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  min-width: max-content;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-subtle);
}

.language-switch button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}

.language-switch button:hover,
.language-switch button:focus-visible {
  color: var(--text);
}

.language-switch button.is-active {
  background: #fff;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(31, 35, 40, 0.12);
}

.language-switch svg,
.button svg,
.contact-strip svg,
.interest-item svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 48px;
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 70px 24px 56px;
}

.hero-media {
  align-self: start;
}

.hero-media img {
  width: 240px;
  height: 240px;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: 39% center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-subtle);
  box-shadow: var(--shadow);
}

.hero-copy {
  min-width: 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--success);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  overflow-wrap: anywhere;
}

h1 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: 0;
}

.name-divider {
  color: var(--border);
  font-weight: 400;
}

.role {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 19px;
  font-weight: 600;
}

.hero-summary {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--text);
  font-size: 17px;
}

.contact-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.contact-strip a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.2;
}

.contact-strip a {
  padding: 8px 11px;
}

.contact-strip a span,
.button span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.contact-strip a:hover,
.button:hover {
  border-color: #afb8c1;
  background: var(--bg-subtle);
  color: var(--text);
  text-decoration: none;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  padding: 0 14px;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: #fff;
}

.section {
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 56px 24px;
}

.band {
  position: relative;
}

.band::before {
  position: absolute;
  inset: 0 calc((100vw - min(100vw, var(--content))) / -2);
  z-index: -1;
  background: var(--bg-subtle);
  content: "";
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.prose-block,
.list-block {
  min-width: 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.prose-block h3,
.list-block h3,
.interest-item h3,
.grant-item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: 0;
}

.prose-block p,
.list-block p,
.interest-item p,
.grant-item p,
.publication-body p,
.contact-panel p {
  margin: 0;
  color: var(--muted);
}

.interest-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.interest-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.interest-item svg {
  margin-bottom: 14px;
  color: var(--accent);
}

.publication-group {
  border-top: 1px solid var(--border);
}

.publication-group > h3 {
  margin: 20px 0 8px;
  color: var(--warning);
  font-size: 15px;
}

.publication-item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.publication-year {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.publication-body h4 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: 0;
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.publication-links a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.publication-links a:hover {
  border-color: #afb8c1;
  background: var(--bg-subtle);
  text-decoration: none;
}

.grant-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.grant-item {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.grant-item h3 {
  margin-bottom: 0;
}

.grant-item p {
  align-self: start;
}

.list-block ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.list-block li + li {
  margin-top: 8px;
}

.contact-section {
  padding-bottom: 72px;
}

.contact-panel {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.contact-panel p + p {
  margin-top: 10px;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
}

.site-footer p {
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 24px;
  color: var(--muted);
  font-size: 14px;
}

html[data-lang="zh"] [data-lang="en"],
html[data-lang="en"] [data-lang="zh"] {
  display: none !important;
}

html[data-lang="zh"] .name-divider,
html[data-lang="en"] .name-divider {
  display: none;
}

@media (max-width: 920px) {
  .site-nav {
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand {
    flex: 1 1 320px;
  }

  .nav-links {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 48px;
  }

  .hero-media img {
    width: 190px;
  }

  h1 {
    font-size: 36px;
  }

  .interest-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .site-nav,
  .section,
  .hero,
  .site-footer p {
    padding-left: 18px;
    padding-right: 18px;
  }

  .language-switch {
    width: 100%;
  }

  .language-switch button {
    flex: 1;
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    font-size: 13px;
  }

  .brand small {
    font-size: 11px;
  }

  h1 {
    font-size: 30px;
  }

  .role {
    font-size: 17px;
  }

  .hero-summary {
    font-size: 16px;
  }

  .two-column,
  .interest-grid,
  .grant-item {
    grid-template-columns: 1fr;
  }

  .publication-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .contact-strip a,
  .button {
    width: 100%;
  }
}